Dikembe Mutombo led the NBA in Blocks in 2003-04 with 10.
Dikembe Mutombo shares the top spot with Amar'e Stoudemire.
| Rk | Player | Team | Date | Value |
|---|---|---|---|---|
| 1 | Dikembe Mutombo | NYK | 2004-01-04 | 10 |
| 2 | Amar'e Stoudemire | PHX | 2004-02-07 | 10 |
| 3 | Calvin Booth | SEA | 2004-01-13 | 10 |
| 4 | Shaquille O'Neal | LAL | 2003-12-03 | 9 |
| 5 | Theo Ratliff | POR | 2004-02-24 | 9 |
| 6 | Samuel Dalembert | PHI | 2004-04-03 | 9 |
| 7 | Ben Wallace | DET | 2003-11-21 | 9 |
| 8 | Shaquille O'Neal | LAL | 2004-05-09 | 8 |
| 9 | Ben Wallace | DET | 2003-12-17 | 8 |
| 10 | Tim Duncan | SAS | 2003-10-29 | 8 |
| 11 | Theo Ratliff | POR | 2004-04-07 | 8 |
| 12 | Greg Ostertag | UTA | 2004-03-27 | 8 |
| 13 | Jermaine O'Neal | IND | 2003-12-01 | 8 |
| 14 | Marcus Camby | DEN | 2004-01-09 | 8 |
| 15 | Ben Wallace | DET | 2004-02-18 | 8 |